Insiders who reported open-market trades in the last 12 months at the companies Andrzej Strojwas files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Shuo Zhang - $77K in PDFS purchases and sales in the last 12 months
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Andrzej Strojwas is a corporate insider, tracked as Chief Technology Officer of PDF SOLUTIONS INC (PDFS). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Andrzej Strojwas submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Andrzej Strojwas been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($496K) across all tracked filings.
Andrzej Strojwas is Chief Technology Officer of PDF SOLUTIONS INC (PDFS). 6 SEC Form 4 filings on record going back to 2024, most recently on 1 September 2026. Most recent open-market trade: sold $151K of PDFS on 1 September 2026. Lifetime open-market sales: $496K.
Recent transactions
8
The latest 8 SEC Form 4 transactions reported by Andrzej Strojwas.
InsiderAlpha's records for Andrzej Strojwas go back to 2024: 6 primary Form 4 filings, an average of 2.0 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
